Synthesis and insecticidal activity of novel benzothiazole derivatives containing the coumarin moiety

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A series of novel benzothiazole derivatives containing a coumarin moiety was designed and synthesized.Their structures were characterized in detail via 1 H NMR, 13 C NMR, HRMS spectra and single-crystal X-ray diffraction analysis.The bioassay results indicated that some compounds showed encouraging insecticidal activity against Plutella xylostella and Aphis fabae at 400 mg/L.The preliminary structure-activity relationships were also discussed.